Normal wear for a new gun?

I just purchased a Sig Sauer P226 Navy a few days ago.
After reading through the manual I put around 30 rounds through it
to get myself familiarized with it (after a brief inspection).

after taking it apart to inspect it again after firing the rounds (and to clean it) I noticed some wear on the barrel and just inside of the slide (which slides along the end of the barrel). The black coating is starting to wear off already. There are no tangible scratches or anything but it seems odd to me that the finish would be wearing off after only 30 shots.

this mainly occurs right at the end of the barrel a few repeating marks of the same shape on the top and the bottom just a little ways back.

Is this normal or should I be calling Sig to have this looked at?
The wear corresponds on the inside of the slide right at the muzzle where it's much more silver (where the black coat has worn off) the bottom portion is rubbed off closer and the top rubbing occurs just a bit further back in the barrel.

Thanks ahead of time and sorry if this question is totally ridiculous.

Congrats on your new Sig. Nice, ain't it? As previously alluded to, there's nothing you can do about that barrel wear aside from making your Sig a "Safe Queen"; Sigs weren't really designed for that. I recently had the privilege of shooting a well-worn, rusty levered Sig P229 chambered in .357 Sig. It had seen a lot of use but shot just great. The owner was still in love with it, rust, scratches, worn finish and all. One last thing about most Sig Sauers: you won't have to expend 500 to 1000 rounds of costly ammo to "break it in".

Yup, the other guys are on the money. It's perfectly normal. I am sort of the opposite of Shipwreck, and don't give a damn what my defense guns look like. They're here to take care of me, not vice versa. I think a well-worn pistol is the mark of a serious shooter who practices a lot.

Thanks for the question from 4 years ago. I was wondering the same thing about my, I think it's about 10 years old 'used to be a safe queen' 92FS. My first almost new gun. Seeing the same kind of wear on the barrel right where it goes through the slide I was concerned, as you were, that something was rubbing wrong and I would at the least have to re-blue it and at most take it to a gunsmith. On my initial trip to the range I had stove pipes and FTE's because I had not cleaned it first. Newb mistake, didn't even think about that. (I now clean after every range trip, part of the enjoyment for me.) Second time to the range it fed flawless and I put more rounds through it than it had since it's birth. Now starting up between 200 and 600 rounds I notice those rub marks showed up.

With this information I am not going to worry about them for now but rather offer them as proof of practice.

My question is, can I expect them to go all the way to shiny metal and if that happens should I worry then? The slide and barrel won't rust will they? This hobby only got started for me 5 months ago so I'm still learning. Today's metals are different than my old blue .22lr squirrel gun.